Clue

Ovulation and period tracker, menstrual cycle calendar and fertility app.

Clue Period & Ovulation Tracker is a science-packed health and period tracker designed to decode your menstrual cycle in every life stage – from your first period to hormonal changes, conception, pregnancy, and even perimenopause. Clue’s period tracker helps you understand your body's unique rhythm, offering deep insights into your menstrual cycle, mental health, PMS, and fertility with advanced ovulation predictions and birth control tracking.

Your health data is protected with Clue under the world’s strictest data privacy standards (the EU GDPR), so you always stay in control. 🇪🇺🔒

Period Tracker for Menstrual Cycle Tracking

• Clue’s smart algorithm powers a reliable period tracker with accurate predictions for your period, PMS, ovulation, and more.

• Plan your life better with Clue’s period calendar, ovulation calculator, and fertility tools.

• Use Clue as your daily period tracker to monitor 200+ factors like mood, energy, sleep, and mental health—and how they relate to your menstrual cycle.

• Clue can help as a period tracker for teens or anyone with irregular cycles, helping identify patterns and manage symptoms like PMS, cramps, PCOS, or endometriosis.

Ovulation Calculator & Fertility Tracker

• Use Clue as both an ovulation calculator and a fertility tracker—no need for ovulation strips or temperature tracking.

• Clue Conceive’s clinically-tested algorithm delivers daily fertility insights, ovulation tracking, and ovulation estimates—helping you get pregnant faster.

• Pinpoint ovulation with options like basal body temperature tracking (BBT), all within your period tracker app.

Pregnancy Tracker & Weekly Support

• Track your pregnancy week-by-week using Clue’s pregnancy tracker with guidance from certified Nurse Midwives.

• Stay on top of pregnancy symptoms and milestones using Clue as both a pregnancy tracker and comprehensive period tracker before, during, and after pregnancy.

Period Tracker Reminders & Birth Control Alerts

• Set helpful reminders in your period tracker for birth control, PMS, ovulation, and your next period.

• Get alerts from your period tracker when your cycle changes or PMS symptoms shift.

Track Health Conditions and Irregular Cycles

• Clue is a reliable period tracker for people with PCOS, endometriosis, irregular periods, or perimenopause.

• Understand your menstrual health better with tools for period tracking, symptom tracking, and cycle syncing.

• Use Clue as your go-to irregular period tracker for cycles that aren’t consistent.

Additional Cycle Tracking Features in Clue:

• Explore over 300 expert-written articles on menstruation, fertility, pregnancy, and more—all accessible within your period tracker.

• Personalize with daily notes and custom tracking tags.

• Use Clue Connect to share your cycle insights with partners and stay aligned on your PMS, period, and fertile days.

Clue’s award-winning period tracker is backed by science, with partnerships involving researchers at UC Berkeley, Harvard, and MIT. Be part of a global movement advancing menstrual health knowledge for everyone with a cycle.

Note: Clue Period Tracker and Ovulation Tracker should not be used as a form of contraception.

Visit support.helloclue.com for help and resources.

Download Clue to start using your free period tracker today. Subscribe for deeper insights and unlock premium features in your ovulation tracker, pregnancy tracker, and perimenopause tools.